Grinding-machine.



wi [magno No. 705,226. Patented my 22, |902.l

J. ETTINGER.

GRINDING MACHINE.

(Application filed May 3, 1902.) (No Model.) 5 Sheets-Sheet L Illlllllll Hlllllllllli j Mmmm q/ Y Eli- 5 vwawkoz No. 705,226. Patented .luly 22, |902. J. ETTINGER.

GRINDING MACHINE.

(Application filed May 3, 1902.) (No Model.) 5 Sheets-Sheet 2.

Wittmann l (Fa/0MM Patenten my 22, |902. J. ETMGER.

GRINDING MACHINE.

(Application @led May 3, 1902.) (No Model.)

5 Sheets-Sheet 3.

.......lllll'l noauto-a Q/Vn @man W m66/ @www Mr No. 705,226. Patented luly 22, |9102.

J. ETTINGER.

GRINDING MACHINE.

(Appliation iled Hay S, 1902 5 Sheets-Sheen 4.

@mig/@ a L TJ' 1 g No. 705,226. Patented lulv 22, |9102.

J. ETTINGER.

GRINDING MACHINE.

(Application led May 3, 1902. l

(nu Model.; 5 sheets-sheet 5.

@Inventor @MAN huzowa W @MM' M W @17%, @ttrcfmus UNITED C rricng" JOEL ETTINGER, OE CHESTER, PENNSYLVANIA, ASSIGNOR TO THE ETTINGER MACHINE COMPANY, LIMITED, OF CHESTER, PENNSYLVANIA.

GRlNDlNG-YVIACHINE.

SPECIFICATION forming part of Letters Patent No. 705,226, dated July 22, 1902.

Application iled May 3,1902. Serial No. 105.817x (No model.)

To @ZZ whom it may concern: from endwise movement therein. From the Be it known that I, JOEL ETTINGER, a citicasting projects laterally a supporting-rod zen of the United States, residing at Chester, for the gage-fingers. This rod may be rigin the county of Delaware and State of Pennidly attached to the casting, or it may be at- 5 Sylvania, have invented certain new and usetached to a collar adjustable in an. arc around ful Improvements in Grinding-Machines, of the axis of the casting. To the supporting- Which the following is a specilication. rod is attached a horizontally-projecting arm,

lWIy invention particularly relates to grindwhich may be adjusted radially with refering-machines adapted to grind or sharpen the ence to the axis of the cutter-head or longi- 6o 1o bits of rotary cutters, and more especially to tudinally on the supporting-rod, and this arm that class of such machines which are adaptcarries one or more gage iingers, each of ed to grind or sharpen the circular bits emwhich may be clamped in any desired posiployed for cutting the tongues and grooves tion on the armthat is, it may be moved on boards. f longitudinally on the arm or about the axis I5 In carrying out my invention I provide a thereof and it may also be moved about an suitable grinding-wheelwhich maybe mountaxis perpendicular to the axis of said arm ed and driven at a high speed in any apand also radially with reference to said arm. proved manner. The-cutter-head carrying The arrangement of the mechanism is such the circular bits is supported on a carriage that the cutter-head, by means of the sliding 7o :o provided with devices for holding the bits in platform, may be moved in a direction paral- 'proper position to be ground or sharpened, lel with the axis of the grinding-wheel toand a gage of novel construction is employed ward and from the grinding-wheel, and it to insure the uniform grinding of the bits to may be moved transversely to the. axis of the the same radius and to the proper shape. grinding-wheelby means of the carriage. It 25 The bed-plate of the machine is provided may be adjusted vertically toward and from with rails, on which slides in a direction parthe grinding-wheel by means of the handallel with the axis of the grinding-Wheel a Wheel, before referred to. It may be given platform provided with bearings for an axle the desired horizontal inclination in a horicarrying Wheels, on which rests one end of a Zontal plane by means of the clamp-socket 8o 3o carriage, the opposite end of the carriage beand a vertical inclination by means of the ing supported by a horizontal arm, which exdevices employed for connecting the casting, tends through a guide-opening formed in a before referred to, to the laterally-projecting standard rising from the platform. The cararm of the clamp-socket. Suitable indexes riage is provided with a stub or upwardlyare provided for enabling the operator to ad- 35 projecting extension having a Vertical openjust the mechanism to the proper position being which receives a vertical screw-threaded fore the grinding is started. I also preferspindle operated by a screw-threaded wheel ably employ an additional gage for the purresting on the top of the stub. On the upper pose of setting the cutters preliminary to end of the spindle above the hand-wheel is a grinding. My improved gage or tracker 9o 4o clamp-socket, which may be turned about is also adapted for use in connection with a the axis of the spindle and secured thereto in support, which is adapted to hold a cutterany desired` position,` and this socket-piece head while the bits are being filed by hand carries an arm,upon which is supported a in the ordinary way. y `casting formed with a socket for one end of Further details of the construction, organi- 45 an arbor, to which the cutter-headis attached. zation, and operation of the mechanism will The casting is clamped to the laterally-probe hereinafter more fully described, and the jecting arm of the socket-piece and has a subject-matter deemed novelwill be setforth limited movement about the axis of said latin the claims. erally-projecting arm. The arbor whichcar- In the accompanying drawings, Figure l 10o 5o ries the cutter-head is adapted to revolve in shows a front elevation of a grinding-mathe socket in the casting, but is prevented chine embodying my improvements with a cutter-head in position to be ground. Fig. 2 shows a left-hand elevation thereof. Fig. 3 shows a top plan view of the same. The remaining figures are on an enlarged scale. Fig. 4 is a view of the gage, partlyin section and partly in elevation and with some parts broken away. Fig. 5 is asectional viewillustrating the construction and operation of the vertically adjustable spindle on which is mounted the clamp-socket that carries the casting which supports the arbor for the cutter-head. Fig. 6 is a view, partly in elevation and partly in section, of the arbor which carries the cutter-head and the casting which supports the arbor. Fig. 7 shows bottom plan detail views of the gage-iin gers and their supporting-collars. Fig. 8 shows a cross-section on the line 8 8 of Fig. 6. Fig. 9 isa detail View of a part of a cutter-head carrying circular bits of the kind for which my grindingmachine is especially organized. Fig. l0 is a perspective view of a support adapted to hold a cutter-head while it is being filed with my improved gage or tracker applied; and Fig. ll is a detail view, on an enlarged scale, showing the devices for supporting and clamping the arbor on which the cutter-head is mounted.

Referring to Figs l to 9, inclusive, from the bed-plate A rises a standard B,carrying lubricated bearings C for a shaft D, to which the grinding-wheel E is removably secured. The shaft D also carries a band-pulley F, which may be driven in any suitable way. The bed-plate A is provided with rails d, which support a platform G, from which rise lugs H, supporting an axle I, on the ends of which are mounted the wheels I. The axle is preferably held rigidly in the lugs H by means of a screw H' and the Wheels revolve about the axle. The platform may be moved back and forth in a direction parallel with the axis of the grinding-wheel and may be set in any desired position by means of clamping devices J, extending through a slot J' in the bed-plate. A standard K rises from the rear end of the platform, and at its upper end is formed with a sleeve K', through which projects an arm K2, extending rearwardly from a stub L', projecting upwardly from the rear end of the carriage L. .The carriage at its front end is formed with downwardly-projecting ianges Z, which rest on the rollers or wheels l'. In this manner the carriage is supported so that it may move freely back and forth in a direction at right angles to the axis of the driving-shaft, and it is prevented from movement in a direction parallel with the direction of the driving-shaft relatively to the platform J.

The stub L is formed with a socket-piece Z' for the spindle M. This socket-piece is slotted at Z2, as indicated in Fig. 2, the slot extending vertically from the bottom of the socket-piece nearly to the top thereof, and on opposite sides of the slot are formed iianges Z3, carrying a clamping-bolt Z4, by means of which the area of the socket may be increased or diminished. The vertical spindle M is screw-threaded, as indicated, and extends vertically through the socket-piece Z'. It engages a hand-wheel M', which rests on the top of the socket-piece Z'. The spindle is formed on one side with a vertical groove fm, into which extends a screw m', that enters a screw-threaded opening in the socket Z'. By this means the spindle M may be raised and lowered by the wheel M', but it is prevented from turning about on its own axis. important that when the spindle is once adjusted it should be held Iirrnlyin place against movement in any direction. If the hand-wheel M' were accidentally moved, it might change the adjustment of the mechanism, and as a safeguard I therefore employ the hand-wheel N, having a screw-threaded spindle n', entering ascrew-threaded openingin the socketpiece Z' and extending into the groove m of the spindle M. By means of this hand-wheel the spindle may be securely locked in the socket-piece Z', so that it cannot be moved relatively thereto even by the hand-wheel M'. By means of the clamping-bolt Z4 the spindle may be made to fit closely the socket-piece, so that it may be prevented from wabbling or tilting, as it might do if the socket were much larger than the spindle.

The upper end of the spindle M is formed with a shoulder o, and above this shoulder the spindle is made smooth and cylindrical to receive the sleeve portion o' of the clampsocket O. This clamp-socket is split, as indicated most clearly in Fig. 2, and on opposite sides of the slot 02 is formed with flanges 03, with which engages the screw-threaded portion of a spindle o4, carried by a handwheel O'. The clamp-socket may be turned in a horizontal plane about the axis of the spindle Mand may be clamped firmly in place on the spindle M by means of the hand-wheel O'. A cylindrical arm P projects laterally from the clamp-socket O, and on this arm is supported a casting Q, that carries the arbor R, to which the cutter-head is attached. The casting Q is formed with a socket that receives the arm P, and the casting is split at p and provided on opposite sides of the slotted or split portion with flangesp', with which engages the screw-threaded spindle p2 of the hand wheel P2, by means of which handwheel the casting Q may be firmly attached to the arm P, or it may be loosened thereon,

so that it may be turned relatively thereto.-

Only a limited movement can, however, be given to the casting Q relatively to the arm P, inasmuch as the arm P is provided with a feather p3, which enters a groove q in the casting Q. This groove is only slightly wider than the feather p3, and therefore the casting Q can only be tilted either upwardly or downwardly to a very slight extent, the purpose of this adj ustment beingto so hold the cutter-head relatively to the grinding-wheel that It is- IIO IZO

the frame of the cutter-head may be held out of contact with the grinding-wheel when the bits or cutters are being sharpened.

The arbor Ris provided with a cylindrical front portion r, to which the cutter-head may be attachedin any suitable way. The rear portion r' of the arbor is somewhat reduced in diameter and extends into a socket q in the casting Q. The rear portion r is formed with an annular groove r2, which receives two semicircular shoes r3, that are held in the groove by means of screws 12, extending laterally through the casting Q and into recesses in the outer faces of the shoes. The parts within the socket q are made smooth, so that the arbor may revolve or be turned easily; but endwise movement ot the arbor in the socket is prevented by means of the shoes and the set-screws q2.

By the mechanism thus far described the cutter-head S (illustrated in Fig. l) may be moved in any desired direction relatively to the grinding-wheel E, and by moving the carriage L back and forth transversely of the axis on the revolving grinding-wheel the bits s may be sharpened. It is important, however, that the bits should be uniformly sharpcned-that is, that they should be sharpened in such manner that their outer cutting-faces shall all be of the same radius relatively to the axis of the cutter-head-and as the bits have their cutting edges inclined in the manner illustrated in Fig. 9 it is important that these inclined edges should be uniform throughout the series ofbits. I have provided a gage, or, as I call it, a tracker,J7 by means of which the operator may determine when the bits are being properly ground and which will enable him t-o make proper adjustments of the mechanism should the original adjustment not produce the desired result.

To the casting Q, I attach a rod T, which supports the gage-fingers or trackers. This rod may be rigidly attached to the casting Q but it is preferably attached to a collar T', that may be adjusted about the axis of the arbor It by means of a set-screw t. The purpose of this adjustment is to hold the gagefingers or trackers in any desired position about the axis of the arbor to accommodate variations in the light. Sometimes the light strikes the gage-fingers when they are in one position better than when they are in another position. This adjustment of the supporting-rod enables me to hold the gage-fingers in the best light obtainable. The rod T is preferably attached to the collar T by a screw-threaded connectiomas shown,a clamping-nut i being employed, so that the rod cannot turn about its own axis. The rod carries a sleeve U, which slides longitudinally on the rod toward and from the axis of the arbor which carries the cutter-head. It is necessary to provide a very line adjustment, and themeans which I employ for moving the sleeve U longitudinally on the rod T consist of a sliding nut V, having bosses fu o', provided on their exterior with right and left hand screw-threads. The upper boss o extends into a screw-threaded socket in the lower end of the sleeve U, while the lower boss fu extends into a screw-threaded socket in the upper end of a sliding sleeve W. The sleeves U and W are provided with set-screws .u and W', respectively. When the set-screws fu, W' are loose, the nut V and the sleeves U and WV may be moved quickly along the rod to approximately the desired position. Then the screw W should be tightened, and a line adjustment may be obtained by means of the nut V. After the desired adjustment is reached the set-screw it is tightened.

The gage-lingers are carried by a rod or arm X, projecting laterally in a horizontal plane from the sleeve U. The screw-threaded end an of the rod enters a screw-threaded socket in the boss fr' of the sleeve U. The extreme inner end of the rod X is shaped to enter a longitudinal groove u2 in the rod T, by which means the sleeve U is prevented from turning on its supporting-rod. A clamping-nut :r2 is employed to prevent the rod X from turning in its socket when once adj usted to the proper extent. The gage-fingers are carried by collars y, provided with set-screws y', by means of which the lingers may be adjusted longitudinally on the rod X, and also may be turned about the axis of the arm and held firmlyin the desired position. Each iinger consists of a portion y2, preferably rectangular in cross-section, but having a beveled or inclined outer end. The inner end of the linger is formed with a cylindrical stud g3, entering a corresponding socket in the collar y and held therein by a set-screw p4. By this means the iinger may be adjusted about an axis perpendicular to the axis of vthe rod or arm X, which adjustment enables the iinger to be inclined to correspond with the inclination of the edge ofthe bit s, as indicated in Fig. 9, The construction also enables the lingers to be adjusted in their sockets toward `and from the arm X.

I preferably employ two gage-fingers, but one only need be used. One of the gage-lingers is used for gaging or tracking the bits on one side of the out` ter-head, while the other finger is employed for gaging or tracking the bits on the opposite side of the cutter-head. But one finger, as before stated, may be employed, being `properly adjusted when the grinding operation is transferred from one set of bits to the other set.

As indicated particularly in Fig. l, I employ an additional gage. This is for the purpose of enabling the operator to adjust the bits on the cutter-head in such manner that they will be in proper position to be ground and will require very little, if any, adjustment after they are applied to the arbor R. This gage is similar in all respects to that above described. The collar T is attached to an arbor or mandrel Z, projecting laterally from the front of the standard B. Thecut- IOO IIO

ter-head may be mounted on the arbor Z in such position as to be gaged by the fingers Y Y. After the bits are properly adjusted the cutter-head may be removed from the arbor Z and attached to the arbor R, and then when the mechanism is properly adjusted the grinding of the bits may be proceeded with, the carriage L being moved back and forth, so as to cause the propersurfaces of the bits to pass back and forth in contact with the revolving grinding-wheel. Preferably a clamping device Z2 is employed for holding the arbor Z stationary when it is desired to tighten up the bits on the cutter-head.

Thegage-fingers may be adjusted and firmly held in such manner that they may gage the bits on a series of cutter-heads-that is to say, after once adjusting the gage-fingers the bits on the cutter-head may be properly ground, and then another cutter-head may be attached to the arbor and ground without changing the position of the gage-fingers, which may be set to gage a series of cutters of the same pattern and of the same size.

The operation of the mechanism has been described while describing the construction thereof. The operation of the mechanism employed for adjusting the cutter-head relatively to the grinding-wheel need not be enlarged upon. As to the adjustments of the gage-fingers, it may be further stated that the devices which I employ enable me to bring the gage-fingers in such position relatively to the edges of the cutters that the operator may readily determine when the cutters `have been ground to a sufficient extent.

i The fingers are so mounted that they may be of this bit is continued.

adjusted in radial lines relatively to the axis of the cutter in lines parallel therewith and also about axes perpendicular to the axis ot' the cutter-head.

Fig. l shows the machine in the act of grinding one of th'ebits of the cutter-head S. In order to gage this bit, the operator turns the cutter-head slightly tothe left until the bit comes under the appropriate gage-nger. When the bit just clears the'gage-nger to a uniform extent from end to end of such finger, then the operator knows that the bit has been properly ground and he proceeds to grind another bit. It', however, the bit touches the gage-finger at any point? thereof, the grinding It' the operator cannot `clearly see the relation of the gage-finger to the bit when the finger is in the position shown in Fig. l, he may adjust the collar T on its support in such manner as to move the gage-finger to a horizontal plane either above or below that indicated in Fig. l, where a better lightmay be obtained. It will be observed that the front end of the carriage is provided with an index G', which is used in connection witha pointer G2, and it will also be observed by reference to Fig. 3 that the upper end of the spindle M and the tops of the clamp-casting O are provided with indexes. The longitudinal adjustment ofthe carriage determines the hook of the bitthat is to say, by adjusting the carriage longitudinally to the proper extent in the proper direction more or less hook may be given to the bits, adapting them for Working on either hard or soft wood. Bits intended to work on soft wood require more hook than those intended to work on hard wood. The adjustment of the clamp-casting O about the spindle M enables the operator to set the cutterheadat the proper inclination to accommodate the slant or inclination of the bits, and the indexes on the upper ends of the clampcasting and the spindle renable him to make this adjustment before the cutter-head is applied to its arbor or after it is appliedthereto. The vertical adjustment of the spindle M of course regulates the depth of the cut and accommodates the machine to differentsized cutter-heads or bits of various sizes.

The machine is shown as operating upon the cutter-head-carrying bits adapted to cut tongues on boards; but the machineis adapted also to sharpen bits adapted to cut grooves, in which case the grinding-wheel, which is beveled, as shown, should be removed and reversed.

In Figs. lO and ll I have shown my improved gage or tracker applied to a simple support adapted to hold a cutter-head while the bits are being filed in the ordinary Way. l indicates a base, from which rises a tubular standard 2, that receives the downwardlyprojecting arm 3 ofthe mandrel-socket 4. The mandrel 5 is adapted to receive a cutterhead on its outer end, While its inner portion is shouldered at 6 and reduced in diameter at 7, where it enters the socket 4f. The inner portion of the mandrel is formed with an annular groove 8, in which fits a semicircular shoe 9, engaged by a set-screw l0, extending through the socket 4. By this arrangement when the set-screw 10 is loose the mandrel may be turned about its axis, by which the set-screw :is tightened and the mandrel is held against movement. The socket t may be turned to any convenient position about the axis of the arm 3 when the set-screw ll is loose. By tightening the screw 11 lthe socket is held firmly in place. The gage or tracker 12 is of the same construction as that hereinbefore described. The cutter-head should be securely fastened to the mandrel 5 and the bits filed or sharpened one after the other, the operation being tested from time to time by the tracker.

I claim as my inventionl. The combination with a support for the cutter-head; of a gage for the cutters which is adjustable radially with reference to the axis ofthe cutter-head and also in a direction parallel with such axle.

2. The combination with a support for the cutter-head; of a gage for the cutters adjustable radially with reference to the axis of the IOO cutter-head, and also in an arc about an axis parallel with the axis of the cutter-head, but outside the arc in which the cutter moves.

3. The combination with a support for the cutter-head; of a gage for the cutters adjustable radially with reference to the axis of the cutter-head, and also in an arc outside of the plane of rotation of the cutters lout struck from the axis of the cutter-head.

1t. The combination with a support for a cutter-head; of a gage for the cutters adjustable radially with reference to the axis ot' the cutter-head in a direction parallel with said axis, in an arc about the axis of the cutterhead, and also about an axis perpendicular to the axis of the cutter-head.

5. The combination with a support for a cutter-head; of a gage-linger having an inclined edge or face next the cutters, and means for adjusting said gage-finger toward and from the axis of the cutter-head, and also in a direction parallel therewith.

6. The combination with a support for a cutter-head; ot a collar surrounding the axis of the cutter-head; a rod projecting therefrom; an arm projecting laterally from said rod; a gage-linger carried by said arm; means for adjusting the collar about the axis of the cutter-head, and devices for adjusting the laterally-projecting arm on its supporting-rod.

7. The combination with a support for a cutter-head; of a rod projecting radially with reference to the axis of the cutter.head; a laterally-projecting arm on said rod; a sliding sleeve carried by said rod; devices for clamping the sleeve to the rod; a sliding sleeve on the rod to which the laterally-projecting arm is attached; a nut interposed between the two sleeves for adjusting the sleeve carrying the arm; and a gage-finger carried by the laterally-projecting arm.

S. The combination with a support for a cutter-head; of arod projecting laterally with reference to the axis of the cutter-head; a

laterally-projecting arm supported by said I rod; a collar on said arm adjustable longitudinally thereon, and also about the axis thereof; and a gage-linger carried by said collar adjust-able about an axis perpendicular to the axis of said collar-supporting arm, and also toward and from said arm.

9. In a grinding-machine the combination with a grinding-Wheel and a support for the cutter-head; of means for adjusting the support for the cutter-head relatively to the grinding-Wheel; and a gage for the cutters outside their path of rotation which is adjustable radially with reference to the axis ot the cutterhead, and also in a direction parallel with said axis.

l0. In a grinding-machine the combination of a grinding-wheel; a platform adjustable in a direction parallel with the axis of the grinding-wheel; a carriage mounted on the platform and movable thereon in a direction perpendicular to the axis oi' the grinding-wheel;

a vertically-adjustable spindle carried by the carriage; means for holding the spindle in its adjusted position; a clamp-socket on the upper end of the spindle and adapted to turn thereon without moving the spindle; means for clamping the socket on the spindle; a casting carried by said clamp-socket and turning therewith, and an arbor carried by said casting.

ll. In a grinding-machine the combination of a grinding-wheel; a platform adjustable relatively thereto; a guiding-standard rising` from said platform; a carriage having an arm guided by said standard at one end; means for supporting and guiding the opposite end of the carriage; a vertically-ad j ustable spindle carried by the carriage; means for preventing the spindle from turning; devices for clamping the spindle in its adjusted position; a clamp-socket carried on the upper end ot' the spindle and adapted to turn thereon without moving the spindle, means for clamping the socket on the spindle, a casting carried by said clamp-socket and turning therewith, and an arbor carried by said casting.

l2. In a grinding-machine the combination ot a grinding-wheel; a platform; a carriage supported thereon and guided thereby; a socket-piece on the carriage; a vertically-adjustable spindle extending from said socketpiece; means for enlarging or decreasing the vertical opening in said socket-piece; a screwthreaded hand-wheel resting on the socketpiece and engaging the vertically-adjustable screw-threaded spindle; devices for preventing the spindle from rotating; means for clamping the spindle in its adjusted position; and an arbor for a cutter-head supported on the upper end of said spindle.

I3. In a grinding-machine the combination of a grinding-wheel acarriage movable transversely to the axis of the grinding-wheel; a vertically-adjustable spindle supported on the carriage; aclamp-socket adjustable about the axis of the spindle; a casting connected with said clamp-socket; an arbor for a cutterhead carried by said axis; and devices for tilting or adjusting the casting about an vaxis perpendicular to the axis of the verticallyadjustable spindle.

14. In a grinding-machine the combination of a grinding-wheel; a carriage movable in a direction perpendicular to the axis of the grinding-wheel; a vertically-adjustable spindle carried by the carriage; a clamp-socket carried by the spindle, and having a laterallyprojecting arm; a casting supported on said arm; an arbor for a cutter-head carried by said casting, and means for adjusting the casting about the axis of its supporting-arm to a limited extent, and for clamping it securely to said arm.

l5. In a grinding-machine the combination ofagrinding-wheel; acarriage movable transversely with reference to the axis of the grinding-wheel; a vertically adjustable spindle IOO IIO

In testimony whereof I have hereunto subscribed my name.

JOEL ETTYINGER.

Witnesses:

' W. A. NEAGLEY, A. L. ANDERSON. 

